Wifi Device not repaired - 7 months

I took out a Telkom Data contract through sell direct. The wifi device was delivered to me on 19 May. I only opened the box in July. The sim card damaged the wifi device. I went into the Telkom store at Fourways crossing to give the wifi device in for repairs. It was indicated that the device was out of warranty and I had to pay for the repairs. I paid the initial R188 and was quoted another R600 for the repairs. Up to today, no one can tell me where the device is. I am paying R259 every month on the data contract, but I can't use any data as I don't have the device. I am begging any competent person to please get back to me on this!